How to Change a Fireplace Blower

Allow the fireplace to cool completely. Sweep out the ashes or shut off the gas by turning the gas dial to "Off." Shut off the breaker switch for the fireplace if it has an internal power supply or electric ignition switch.

Remove the tubular ducts that make up a non-motorized fireplace blower. These ducts may make up the grate that holds the wood or ceramic gas logs.

Unplug a motorized blower with the plug in the external receptacle, or access the blower junction box inside the fireplace. The box may be under a cover or removable brick on the floor of the hearth inside the firebox of a gas fireplace.

Remove the blower ducts from a motorized system by pulling them out of the firebox. Use a screwdriver to loosen any ducts that are secured to other parts of the fireplace. Remove the fan and motor if it is a separate unit that attaches to the ducts on the inside or outside of the firebox.

Install a fireplace blower replacement unit that is the same size as the old blower. Use a new fireplace blower with upgraded heat transfer capacity for improved fireplace efficiency if you desire, but be sure the unit will fit into the firebox. Plug in the fan motor if the unit uses power. Restore the electric power and turn the gas dial back on. Build a wood fire or flip the switch to start a gas fire and test the new fireplace blower.